Your reply sounds like the Indian Mother in law vs Daughter in law where a woman claims a right to mistreat her daughter in law because she was earlier ill treated when she herself was a daughter in law.
There you go again about 8255 and all that jazz. We do a lot of things as a part of learning process, even though they appear to be obsolete or irrelevant from an expert's point of view. Is anybody going to break a leg or lose an eye if the wrong device is studied? Or did you stop learning a long time ago?
You hammer the SMS postings, but this guy was very respectful and polite, at least you could be in turn pointing out the error of his ways politely.